Tie-plate



I A. MORRISON.

.TIE PLATE.

APPLICATION FlLED JULY 30, 1919.

Patented Oct. 26, 1.920.

UNITED "STATES PATENT OFFICE.

ANDREW MORRISON, F TOWNSHIP, ALLEGHENY COUNTY, PENNSYLVANIA,

ASSIGNOR T0 DILWORTH, PORTER & COMPANY,

INCORPORATED, or PITTSBURGH,

PENNSYLVANIA, A GORPQRA TION OF PENNSYLVANIA.

TIE-PLATE.

Specification of Letters latent.

Patented 0a. 26, 1920.

Application filed July 30, 1919. Serial No. 314,240.

To all whom it may concern:

Be it known that I, ANDREW MORRISON, a

' citizen of the United States, residing at object to provide a tie plate having intersecting ribs formed on the bottom thereof, and so located that a reinforced tie plate is produced.

Another object of the presentinventio'n is to provide a tie plate-having longitudi nally and transversely extending ribs, all of which are "spaced from therespective edges of the tie plate. 7

A further object of the present invention is to so position the spike openings in the tie plate that water passing therethrough will be drawn by capillary attraction from a under the tie plate, whereby the surface of a the tie lying directly beneath the tie plate is prevented from rotting.

A still further object of the present invention is to provide a tie plate having a plurality of suction or holding squares or spaces formed thereon, tending to securely anchor the tie plate in position. I

The foregoing and other objects, together with their attendant advantages, will be apparent as the inventionbecomes better under stood by reference to the accompanying s ecification and drawings forming a part thereof, it being premise that changes may be made in the various details and themanner of operation within the. scope of the appended claims without departingirom the spirit of the invention.

Figure 1 is a sectional view illustrating a rail in position on a tie plate and showing diagrammatically the force produced by a wheel travelingover the rail..

Fig. 2 is a bottom view of the tieplate illustrated in Fig. 1.

It has heretofore been proposed to con struct tie plates having longltudmally'and transversely extending ribs formed on the bottom thereof. With such construction, "however, it has been common to have the tioned, if the tie plate were nnsylvania, have invented av outermost ribs extending around the peplate. When so posised on a narriphery of the tie row tie, splitting of the tie resulted and water-receiving grooves tirely around the tie plate.

It has also been proposed to provide tie plates with diagonally extending intersect ing ribs but in actual use, it has been found that ribs so positioned do not effectively resist' the creeping action or spreading action ofthe railsz I am also aware that tie plates were formed enhave been constructed in which V-shaped ribs have been formed on the base thereof, but with constructions of this nature the reinforcing action desirable and the anticreeping action has not been secured. The present invention is particularly designed to overcome the objections to tie plates as ordinarily constructed and to provide a tie plate having ribs extending in a particular man-* ner whereby creeping is efl'ectively prevented and a reinforcing at the desired point is roduced.

eferring more particularly to the draw.- ings I have illustrated a suitable tie 2 having my improved tie plate 3 in position thereon. In its preferred embodiment, the tie plate comprises an'upper rail-receiving surace 4 having a transversely extendinlg abutment 5 defining one limit thereof. esting on the rail-receiving surface 4, and held in position by suitable spikes or the like 6, extending through the opening 7, is a rail 8.

f It is highly desirable in aconstruction of so posithis nature to'have theopenings 7 into the tioned that they extend entirely partially unobstructed outermost spaces escape of water is prevented. .Also, in the present construction, by'having the outermost longitudinally and transversely extending ribs spaced from the respective edges of the -tieplate, substantially flat bearing su'rfaces are QpI'OVlClGd adjacent such edges "so that the fiber of the tie is not broken. The ribs provided on, the present tie plate not only prevent lateral movement of the plate, which would-result in separation of the transversely extendingribs v9 directly belowprovided for directly sustaining the load 'adrepresents the affective rails, and longitudinal'movement produced by setting the brakes on the train, but, by reason of their particular position, serve as reinforcing means for the tie plate. It has been found that in actual use a tie plate is subject to two predominating forces. These.

forces have been illustrated diagrammatically by means of arrows in Fig. 1, in which figure the arrow A represents the direction of the affective force exerted by the flanged wheels, the arrow A the load carried by the wheels, and the arrow A represents the resultant of these forces. This resultant force is transmitted-to the tie plate in the'manner 1nd1- cated by the dotted arrow A, tending to break the tie plate in the plane of the line of intersection between the abutment 5 and the rail supporting surface 4. In order to overcome this action, I form one of the this line of intersection so that means are jacent one of the base flanges of the rail. In order to directly sustain the load of the opposite side of the base flange of the rail, I position another of the transversely extending ribs so stantially directly beneath the edge of the rail flange when placed thereon. Still another of the transversely extending ribs is illustrated as formed intermediate the. ribs referred to so that a direct support for the web of a rail is insured. v

The longitudinally extending ribs intersectin the transversely extending ribs before escribed, form suction squares or spaces 10, substantially centrally of the tie plate. These spaces have unbroken ribs surrounding the same, effectively cooperating with the projecting ribs for maintalnlng the tie plate in proper position on the tie.

The broad bearing surfaces provided around the edges of the tie plate, cooperating with the particular manner of reinforcforce produced by 7 having an upper rail receiving surface,

that it occupies a position sub located suction spaces,

plate to directly sustain-the load of one edge of the base flange of the rail, a second trans-' versely extending" I'll) formed on the lower surface of the plate to directly sustain the load of the 'other edge of the base flange of the rail, a third transversely extending rib intermediate, said first mentioned ribs for directly sustaining the load through the web of the rail, and simi rly shaped longitudinally extending ribs intersecting said transversely extending ribs and forming a plurality of centrally located section'spaces substantially as described.

2. As an article of manufacture, a tie plate a rail abutment extending transversely of the plate, a transversely extending rib formed on the lower surface of the plate directly beneath the line of junction of the abutment with the plate to directly sustain the load of one edge of the the lower surface of the plate to directly sustain the load of the other edge of thebase' flange of the rail, a third transversely extending rib intermediate said first mentione ribs for directly sustaining the load through the web of the rail, and longitudinally exbase flange .of the rail, a V second transversely extending rib formed on tending ribs forming substantially centrally of uniform cross sectional area throughout their length; substantially as described.

all of said ribs being In testimony whereof, I have hereunto set mi 111 hand.

y ANDREW MORRISON. 

